math::round

Function half_down

Source 
pub fn half_down(value: f64, scale: i8) -> f64
Expand description

Round half down.

Round value to accuracy defined by scale rounding half down. Positive scale defines the number of decimal digits in the result while negative scale rounds to a whole number and defines the number of trailing zeroes in the result.

§Arguments

  • value - value to round
  • scale - result accuracy

§Examples

use math::round;

let rounded = round::half_down(3.14159, 3);
assert_eq!(rounded, 3.141);
use math::round;

let rounded = round::half_down(3456., -2);
assert_eq!(rounded, 3400.);